Roof structure



J. H. KEEFFE ROOF STRUCTURE Ema 5, 193330 Filed April 30, 1950 Patented Dec. 5, 1933 i i I UNEEED STATES PATENT OFFlfiE ROOF STRUCTURE James H. Keeffe, Sioux City, Iowa Application April 30, 1930. Serial No. 448,605

2 Claims. (01. 10s-2s) This invention appertains to new and'useful As is clearly shown in Fig. l, a pillar 10 is improvements in roof structures, and more parprovided for each end of the arch structure, and ticularly to a novel arch unit built up of a multithe upper portion of each pillar is provided with plicity of elongated elements. steps 11, 12 and 13. It can also be seen that The principal object of the invention is to prothe ends of the arch structure are cut off in a (50 vide an arch structure for curved roofs, the same stepped fashion so as to mesh with the steps being of box construction to insure lightness with- 11, 12 and 13, of the pillar structures.

out sacrificing any of its load resisting ability. Furthermore, a pair of anchor bars 14-14 are Another important object of the invention is to provided at each end of the arch structure.

provide a novel arch structure and supporting These anchor bars lei-14 extend outwardly 65 pillars for the ends thereof, whereby the ends of from each end of the arch structure. These anthe arch structure, are firmly fixed against the char bars may be secured to the arch structure liability of shifting. by the same bolts 9 and are preferably bent lat- During the following specification and claims, erally at the extended end portions, and em- 15 other important objects and advantages of the bedded in the concrete pillar 10 as in the manner 70 invention will readily become apparent to the substantially shown. reader. Manifestly, the novel arch structure will be In the drawing:- quite practical in the construction of audi- Figure 1 represents a side elevational view of toriums, aeroplane hangars, storage buildings, the novel arch structure mounted upon the garages, and other analogous building structures. 75 pillars. I Furthermore, the box-like construction of the Fig. 2 represents an enlarged fragmentary side arch will render the same light in weight, with-- elevational view of the arch structure. out sacrificing any of its ability to withstand Fig. 3 represents a vertical sectional view taken strain, and stress which may be occasioned dursubstantially on theline 3-3 of Fig. 2.. ing wind storms, etc. so

Referring to the drawing wherein like numerals While the foregoing specification sets forth the designate like parts, it can be seen that the novel invention in definite terms, it is to be understood arch structure is built up of an upper section 5 that numerous changes in the shape, size, and and a lower section 6, each built-up preferably of materials may be resorted to without departing the same number of relatively thin timber lengths from the spirit and scope of the claims appended. l5 6. Between the sections 5 and 6, are interposed Having thus described my invention what I the spaced piles 7-'? built up of elongated timclaim as new is:-- bers 8, each of which is substantially'square in l. A method of constructing arches from a pair cross section. of elongated members consisting in placing the Of course the specific cross section, thickness elongated members in a template, securing the 96 and width of these timbers may vary in accordends of the members together in the template to ance with the nature and construction of the arch retain the members at the curvature defined for different purposes. I by the template, and securing the portions of The foregoing sets forth the timbers that are the members between said secured ends together 40 employed and the relation in which they are at intervals by proceeding inwardly toward the placed with respect to each other. In the practimiddle of the said secured members from the cal assembly of these timbers a template should said secured ends thereof so as to place the be employed, so as to acquire the proper curvature upper member under compression and the lower of the structure. I member under tension. i The timbers are placed on the template and the 2. An arch structure of box cons ruction comends of the timbers are secured to retain the timprising an upper and a lower section, each combers at the curvature defined by the template. prising a plurality of elongated lengths of mate- To place the upper lower timbers under-comrial, an intermediate section comprising a pair of pression and tension respectively, the portions of elongated members arranged in spaced parallel 5c the timbers between the secured ends are secured relationand interposed between upper and its j together at intervals by proceeding inwardly from lower sections, and securing elements disposed the secured ends of the timbers toward the midthrough the upper, lower and intermediate secdle of the secured timbers. Thus when the arch tions to secure the same together.

is removed from the template, the proper curva- 5 ture will be maintained. JAMES H. KEEFFE. 

